title: Focus issue introduction: renewable energy and the environment.
abstract: This focus issue highlights selected contributions from authors who presented promising concepts at OSA's Renewable Energy and the Environment Optics and Photonics Congress held 11-15 November 2012 in Eindhoven, The Netherlands.
authors.forename: Christian
authors.initials: C
authors.lastname: Seassal
authors.forename: John
authors.initials: J
authors.lastname: Koshel